A gerund is a verb form ending in -ing that functions as a noun, as in “Sketching helps me think.” An infinitive is the base form of a verb, often preceded by to, as in “I want to sketch.” The difference is partly about the form and partly about the job each phrase does in a sentence. Some words and constructions accept one form, some accept the other, and some allow both with a shift in meaning. [1]
Recognize the form and its job
In “Sketching helps me think,” sketching names an activity and serves as the subject. In “I enjoy sketching,” it is the object of enjoy. The -ing form still carries verbal meaning: in “Sketching city maps takes patience,” city maps is the object of sketching. That combination is a gerund phrase. Purdue OWL describes gerunds as verbals that function as nouns, including as subjects, direct objects, subject complements, and objects of prepositions. [1]
An infinitive keeps the plain verb form: to sketch, to listen, to wait. In “Mara wants to sketch,” the infinitive phrase completes wants. In “Mara came to sketch,” it explains her purpose. The to in an infinitive is not the same as the preposition to in “Mara walked to the studio.” After that preposition, use a noun-like form: “Mara looks forward to sketching.” Here, to belongs to the prepositional expression, so sketching follows it.
The preceding word often decides
English does not have one general rule that lets you swap a gerund and an infinitive after every verb. Certain verbs commonly select a particular form: “They avoid interrupting,” “He hopes to return,” and “We considered changing the order.” Treat the word and its pattern as a useful unit when learning or editing; do not infer that every verb behaves the same way.
Other constructions narrow the choice. A gerund often appears after a preposition: “She left without answering,” “They succeeded by listening,” and “I am interested in learning.” An infinitive can express purpose: “She paused to answer.” It can also appear after adjectives in phrases such as “ready to begin.” Purdue OWL’s examples show gerunds in noun positions, including after a preposition, and show that a gerund phrase can include its own object and modifiers. [1]
When both forms work
Some verbs permit both patterns, but the meaning can change. Compare “I remembered locking the door” with “I remembered to lock the door.” The first says the locking happened and was recalled afterward; the second says the person remembered and then locked it. In “He stopped talking,” talking ends. In “He stopped to talk,” he stopped another activity for the purpose of talking. The surrounding event tells the reader which timeline is intended.
Not every verb that allows both forms creates a dramatic change, and usage can vary. If you are unsure, check a reliable learner’s dictionary or a grammar reference for the specific verb rather than treating a broad rule as universal. Also distinguish the gerund from a participle: in “The child is sketching,” sketching forms part of the verb phrase, not a noun-like activity. The same -ing spelling can perform different grammatical jobs.
Try a two-version edit
Use this short exercise with the invented example “Nia remembered ___ (send) the room link.” First, decide what happened: did she recall sending it earlier, or did she recall that she still needed to send it? Write both versions: “Nia remembered sending the room link” means the sending came before the remembering; “Nia remembered to send the room link” means remembering led to the action. Then add a time cue—“after the meeting” or “before the call”—and check whether it supports the meaning you intend.
For a practical next step, underline the verb or preposition before each blank in a paragraph you have written. Record the pattern beside it—avoid + gerund, hope + infinitive, or look forward to + gerund, for example. Read the sentence aloud after filling it in. If the form is correct but the timeline or purpose remains unclear, revise the surrounding words rather than forcing a single form to carry every part of the meaning.
